Potassium thiocyanate acts as an efficient sulfur surrogate in C-S cross-coupling reactions mediated by recyclable copperoxidenanoparticles under ligand free conditions. This protocol avoids foul smelling thiols, for the synthesis of a variety of symmetrical diaryl sulfides, via the cross-coupling of different aryl halides with potassium thiocyanate, affording corresponding products in moderate to
and highly efficient protocol for the synthesis of symmetrical aryl sulfides was developed by the cross-coupling of aromatic halides with inexpensive and commercially available thiourea which was used as an effective sulfur surrogate. The present cross-coupling protocol of thiourea, via cascade reaction with various substituted arylhalides, producing desired aryl sulfides, has an added advantage of
Various diarylsulfides, including heteroaryl- and nitrogen-containing sulfides, have been efficiently prepared by rhodium-catalyzed odorless deborylative arylthiolation of organoborons with S-aryl thiosulfonates. The ready availability of starting materials and further transformation of sulfides have rendered a diverse range of organosulfur compounds easily accessible.
High surface and magnetically recoverable mPANI/pFe<sub>3</sub>O<sub>4</sub>nanocomposites for C–S bond formation in water
作者:D. Damodara、R. Arundhathi、Pravin R. Likhar
DOI:10.1039/c2cy20624b
日期:——
A high surface area mPANI/pFe3O4 nanocomposite from mesoporous polyaniline and porous magnetic Fe3O4 was used as a catalyst in the S-arylation of thiophenol with aryl chlorides and in the C–Sbondformationbetween aryl iodides and thiourea in water. The mesoporosity of the polyaniline enhances the efficiency and stability of the porous magnetic Fe3O4 nanoparticles in both coupling reactions. The mPANI/pFe3O4
由中孔聚苯胺和多孔磁性Fe 3 O 4组成的高表面积mPANI / pFe 3 O 4纳米粒子被用作S芳基化的催化剂。苯硫酚 与芳基氯化物和芳基碘化物之间的CS键形成 硫脲 在 水。聚苯胺的中孔性在两个偶联反应中均提高了多孔磁性Fe 3 O 4纳米颗粒的效率和稳定性。mPANI / pFe 3 O 4纳米复合材料可以用外部磁体回收,并且由于多孔Fe 3 O 4纳米粒子的超顺磁性而可以重复使用几次。
Thiophenes as Traps for Benzyne. 3. Diaryl Sulfides and the Role of Dipolar Intermediates
作者:Manfred G. Reinecke、Dario Del Mazza、Marcus Obeng
DOI:10.1021/jo0265176
日期:2003.1.1
mechanisms of formation. The remaining mechanism involves [4+2]-cycloaddition of benzyne to thiophene or to an S-phenylthiophenium ylide 10 to give the dipolar 2:1 benzyne/thiophene adduct 8 followed by ring-opening. Stevens-like rearrangements of 11, formed from 10 by proton transfer, may also explain the origin of arylated thiophenes such as 12 and 3 found in some reactions of benzynes with thiophene.